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2. Some application modes for message exchange
In this chapter, we present a few message exchange models that we can use in applications, illustrating new ways of designing message-based applications.
2.1 Simple transfer or datagram
A datagram message is like a letter in the post. No response is necessarily expected from the application receiving the message. The sending application is therefore not waiting to receive the reply message from the recipient. This is the most common and appropriate use of a message handler: the exchange is completely asynchronous, as shown in figure 2 , in which the queue is symbolized by a vase containing stacked messages.
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Some application modes for message exchange
An example of implementation: MQSeries
References
IBM brochures
SC33-0850 Message Queue Interface - Technical Reference
SC33-0807 MQSeries : Application Programming Guide
GC33-1349 MQSeries : Planning Guide
SC33-0806 MQSeries : MVS/ESA System Management Guide
SC33-1373 MQSeries : AIX Version 2 System Management Guide
Message manager editors
DEC MessageQ marketed by BEA
Tuxedo/Q marketed by BEA
Falcon from Microsoft
AXIME CM2
COVIA
Topend RTQ from NCR
Pipes from PeerLogic
TIB from TIBCO
VCOM from Verimation
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